Membrane control type sustained-release improving agent suitable for southern acid red soil and preparation method of improving agent

A membrane-controlled, acid red technology, applied in chemical instruments and methods, soil conditioning materials, other chemical processes, etc., can solve the problems of local pH surge at the soil fertilization point, reducing the effectiveness of phosphate fertilizers, and mineral nutrient loss, etc. Conducive to the continuous absorption of nutrients, improving the effectiveness of phosphate fertilizers, and reducing the toxicity of aluminum in red soil

Pending Publication Date: 2018-11-02
INST OF SOIL FERTILIZER & RESOURCE ENVIRONMENT JIANGXI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in recent years, the red soil ecosystem is facing the following severe problems: First, the rapid development of industrialization and urbanization has resulted in increased acid deposition and the extensive use of ammonium nitrogen fertilizers in agricultural production, which has intensified the acidification of red soil, which not only makes potassium, calcium, The loss of magnesium, molybdenum, boron and other nutrient elements also increases the activity of heavy metals in red soil and increases the toxicity to plants. Moreover, soil acidification will also affect the activities of soil microorganisms, reduce the number and activity of microorganisms, and affect the organic matter in the soil. Decomposition and transformation; second, the traditional clear tillage farming method leads to continuous consumption of soil organic matter, loss of mineral nutrients, reduced soil fertility, and even makes some red soil areas uncultivable; third, red soil is severely impoverished, and the supply of N, P, and K nutrients Insufficient, a variety of medium and trace elements are lacking, and the fertilization effect is poor due to the characteristics of red soil. For example, the application of phosphate fertilizer is easily fixed by Fe and Al in acidic soil, resulting in a decrease

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  • Membrane control type sustained-release improving agent suitable for southern acid red soil and preparation method of improving agent
  • Membrane control type sustained-release improving agent suitable for southern acid red soil and preparation method of improving agent

Examples

Experimental program
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Example Embodiment

[0037] Example 1

[0038] The raw material composition of the quick-release layer in this embodiment is: biochar 1.2kg, magnesium oxide 4.5kg, silicon calcium magnesium potassium mineral fertilizer 0.2kg, binder: hypromellose 0.15kg, carboxymethyl cellulose sodium 0.15kg and 1.2kg of water.

[0039] The raw material composition of the film-controlled sustained-release granules is: biochar 3.85kg, ammonium phosphate 22.68kg, silicon calcium magnesium potassium mineral fertilizer 0.790kg, binder: hypromellose 0.85kg, carboxymethylcellulose sodium 0.85 kg and 6.8 kg of water, the coated sustained-release materials are: ethyl cellulose 2.05 kg, chitosan 5.47 kg, dibutyl phthalate 1.09 kg and water 2.73 kg.

[0040] The preparation method of a film-controlled slow-release modifier suitable for southern acid red soil includes the following steps:

[0041] (1) Preparation of raw material mixture powder of membrane-controlled slow-release granules: the raw materials of membrane-controlled sl...

Example Embodiment

[0046] Example 2

[0047] The raw material composition of the quick-release layer in this embodiment is: biochar 2.9kg, calcium oxide 3.8kg, silicon calcium magnesium potassium mineral fertilizer 1.0kg, binder: hypromellose 0.04kg, carboxymethyl cellulose sodium 0.04kg and 1.92kg of water.

[0048] The raw material composition of the film-controlled sustained-release granules is: biochar 7.68kg, ammonium phosphate 17.28kg, silicon calcium magnesium potassium mineral fertilizer 1.92kg, binder: hypromellose 0.15kg, carboxymethylcellulose sodium 0.15kg kg and 7.37 kg of water. The coated sustained-release materials are: 1.69 kg of ethyl cellulose, 3.17 kg of chitosan, 1.06 kg of dibutyl phthalate and 1.76 kg of water.

[0049] The preparation method of a film-controlled slow-release modifier suitable for southern acid red soil includes the following steps:

[0050] (1) Preparation of raw material mixture powder of membrane-controlled slow-release granules: the raw materials of membrane-...

Example Embodiment

[0055] Example 3

[0056] The raw material composition of the quick-release layer in this embodiment is: biochar 1.5kg, magnesium oxide 3.0kg, silicon calcium magnesium potassium mineral fertilizer 0.5kg, and binder: hypromellose 0.025kg, sodium carboxymethyl cellulose 0.05kg and 1.275kg of water.

[0057] The raw material composition of the film-controlled sustained-release particles is: biochar 6.36kg, ammonium phosphate 12.72kg, silicon calcium magnesium potassium mineral fertilizer 2.12kg, binder: hypromellose 0.10kg, carboxymethyl cellulose sodium 0.20 kg and 5.0 kg of water. The coated sustained-release materials are: ethyl cellulose 0.96 kg, chitosan 2.40 kg, dibutyl phthalate 0.72 kg and water 1.20 kg.

[0058] The preparation method of a film-controlled slow-release modifier suitable for southern acid red soil includes the following steps:

[0059] (1) Preparation of raw material mixture powder of membrane-controlled slow-release granules: the raw materials of membrane-contr...

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Abstract

The invention relates to the technical field of soil improvement, and discloses a membrane control type sustained-release improving agent suitable for southern acid red soil and a preparation method of the improving agent. The membrane control type sustained-release improving agent comprises membrane control type sustained-release particles, and a rapid release layer which covers the surfaces of the membrane control type sustained-release particles; the rapid release layer comprises 10-30 parts by weight of charcoal, 30-45 parts by weight of an acid modified substance, 2-10 parts by weight ofsilicon calcium magnesium potassium mineral fertilizer, and 5-20 parts by weight of an adhesive; and the membrane control type sustained-release particles comprise 10-30 parts by weight of charcoal, 30-65 parts by weight of a phosphorus-bearing matter, 2-10 parts by weight of silicon calcium magnesium potassium mineral fertilizer, 5-27 parts by weight of an adhesive, and 2-32 parts by weight of amembrane coating type sustained-release material. The membrane control type sustained-release improving agent is capable of improving the efficiency of phosphatic fertilizer while reducing the soil acidity, improving the soil quality and increasing the crop output; in addition, the inner membrane control type sustained-release particles and the outer rapid release layer have the characteristics ofthe charcoal and the silicon calcium magnesium potassium mineral fertilizer, so that the agent can quickly exert an effect, and the soil improving period is shortened; and moreover, the agent can becontinuously released to improve the soil for a long term.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a film-controlled slow-release improver suitable for southern acidic red soil and a preparation method thereof. Background technique [0002] Red soil spreads across thirteen provinces and regions in the south. It is one of the main soil types in southern my country and an important production area of ​​food crops and economic crops in my country. However, in recent years, the red soil ecosystem is facing the following severe problems: First, the rapid development of industrialization and urbanization has resulted in increased acid deposition and the extensive use of ammonium nitrogen fertilizers in agricultural production, which has intensified the acidification of red soil, which not only makes potassium, calcium, The loss of magnesium, molybdenum, boron and other nutrient elements also increases the activity of heavy metals in red soil and increases the toxicity to pl...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C09K17/40C09K101/00C09K109/00C05G3/80
CPCC05B7/00C05G3/00C09K17/40C09K2101/00C09K2109/00C05G3/80C05G5/12C05G5/30C05D1/04C05D5/00C05D9/00C05D3/02
Inventor 刘佳陈静蕊杨成春张杰秦文婧徐昌旭邱才飞谢杰王芳东夏文建
Owner INST OF SOIL FERTILIZER & RESOURCE ENVIRONMENT JIANGXI ACAD OF AGRI SCI
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